Did Charles Barkley go to far with slavery joke?

Anyone who watches Inside the NBA with Charles Barkley, Kenny Smith, Ernie Johnson, and newcomer Shaquille Oneal knows that at anytime anything can and will be said. When asked who his favorite president was Charles Barkley said Abraham Lincoln. The way he expressed it seems to have caused a minor controversy. Ernie Johnson’s reaction of not knowing how to react is priceless.Do you think that Charles went to far this time or was he just joking. Watch the clip here: http://aareports.com/2012/12/did-charles-barkley-go-to-far-with.html